Presence Sensor

[ocean copper]

What are the best DIY presence sensors? I thought about LD2410C or LD2450.

[lavish nova]

Do you want mmwave or pir?

[ocean copper]

i want a presence so mmwave

[ocean copper]

Bought ld2410 and ld2450

[lavish nova]

Was just checking. A lot of people call pir presence sensors because they don't know the difference

[ocean copper]

okay. 👍 😅

[lavish nova]

Both are good - it depends what you want to use it for - the 10 is lower power and better detection range, whereas the 50 can detect multiple people simultaneously and give you XY coordinates.
The 10 is a little outdated now though, the 12 is a bit more expensive but a lot more capable

[ocean copper]

Ok, then I'm gonna buy the 12.
I thought about combining them so 12 just for detection if someone is there and 50 for the zone

[lavish nova]

Yeah that's quite a common approach - the apollo automation r-something and everything presence pro both use multiple sensors

[ocean copper]

I wanted to go the cheaper way. Hope it works 😄

[lavish nova]

Honestly I'm not sure how much cheaper it works out. When it comes to doing that level of sensing in my next house I'll probably go with one of them just for ease of use

[ocean copper]

What extra better sensors do they have?

But I mean 50€ compared to like 15€ is quite a difference.

[lavish nova]

PoE is something I want to minimise wiring but keeping my WiFi from getting cluttered, and just an olimex PoE ISO board (not a great form factor for this kind of sensor imo) is 25-30 on it's own
Then throw in a pir sensor to pick up motion a bit quicker when people enter the room (useful for light control) and lux sensor and you will be close to that 50Eur in component cost, then you've got to put it in a case

[ocean copper]

yeah. PoE is nice, but I don't have those ports all over my house. And the Sensors I bought are just for testing. Maybe I'll add a pir and lux later.

What do you think is the best way to combine these two sensor together in HA?

[lavish nova]

Yeah that's fair.
Honestly as cheeky as it is, just look at how the pros do it
https://github.com/EverythingSmartHome/everything-presence-pro/tree/main/common
https://github.com/ApolloAutomation/R_PRO-1/tree/main/Integrations/ESPHome